Valve-grinder.



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Specification of Letters Patent.

rammed-new., ee, 'iota Application filed June 27, 1916. 'Serial No.106,215.

To all whom 'it may concern.' l

,Be it known that' I, VALENTINE Pirsmn, a citizen of the United States,residing' at ew York, in the county'of Bronx and State of N ew York,have invented new and useful Improvements in Valve-Grinders, of whichthe following isa-specification.

The invention relates to an improvement in valve grinders, particularlydesigned for use in grinding automobile valves in then seats.v v i lngrinding* this type of valve, it has been found that to secure a properseat it is-necessaiiy to reciprocate the valve on its lseat followingthe application of a suitable valve Agrinding' compound, the valve beingreciprocated` rather than rotated in order to secure contact under anyand all conditions, as the valve. frictronally rotates in use. I

The improved valve grinder comprises a stemformed at one end with ahandle and at the opposite end with an appropriately shapedl terminal toengage the valve, the stem having,r a longitudinal movable element andthere being1 provided a cooperating connection between the stem andelement to rapidly and rotarily reciprocate the stem the valve inthemovement of the element longitudinally of the stem.

The invention in the preferred form of details will.be described in thefollowing; specification, reference being; had particularly to thewhich: A

Figure 1 is a view in elevation, partly in section, illustrating theimproved valve grinder. Fig. 2 is a, transverse section on the line 2 2of Fig. 1.

The improved valve grinder comprises a stem l of appropriatelengthformed at one end as 2, with a screw driver terminal or otherappropriate terminal by which the rod may be temporarily connected withthe valve disk. The opposite endof the stem is provided withanappropriately formed handle 3, the juncture of the stem and han* dlebeing such as to permit independent rotation of the parts, in orderthat` the handle may be utilized to apply sufiicient grinding` operationaccompanying drawings, in

without interfering with the rotary more ment of the stem.

The stem 1 opposite sinuous being diametrically opposite and parallelthroughout their lengths. Preferably" the lateral deviation' of themaximum limit of any one 'phase of the groove is approximatelytwolthirds the stem, so that the stem proximately 'throughoutcircumference. made up of a series of phases, one merggdn'ggintoanother, and the operating' element 5 in the form of a sleeve, which isfreely slidabde on the stem circumference of the is reciproczntedYtwo-thirds ofthe" The respective grooves aref 1, is provided with! islongitudinally ferma wat y grooves 4, these grooves,

threaded pins 6, which terminally" seat in the respective grooves. It isapparentthat reciprocation of the sleeve causeegfza-seri s of rotarilyreciprocating` movements of the.;y

stem, .and thereby of the valve in-whichfthe. reeiprocatf stem 1sconnected, these rotarily ing movements being successively in oppo sitedirections and to a number correspond ing to the number of distinctphases of the grooves in thelength of the stem. herefore in a singlsleeve longitudinally of the stem, the latter will be oppositely numberof times, thereby rapidly grindingthe valve.

`Havingf described my invention what claim and desire to securebyLetter-'sPat-lv ent is:

A valve grinder includinga a stem, a haar die mounted on one endthereof, the opinos site end of the stem being integrally' formed `toengage the valve, said stem being' formed with opposite sinuous grooves,and a sleeve slidably embracing the stem and formed at diametricallyopposite points with countersunk threaded openings, and pins threaded insaid openings and having terminals to freely engage the sinuous grooves,the sleeve loosely iitting` the stem and the plain terminals of the pinsloosely fitting the grooves, whereby to ing' in operation.

1n testimony whereof l affix my signature.

VALENTNE PXPSHWIK.

e reciprocal movement of the rotarily reciprocated a o reduced plainavoid stick-

